Variation characteristics of vegetation succession and soil enzyme activities in energy base of Northern Shaanxi Province

The vegetation succession and soil enzyme activities restoration with different growing years was analyzed by applying the spatio-temporal substitution method. The result showed that H. Rhamnoides and A. Desertoru are predominant species of the shrub layer. With the restore years prolonging, the species diversity index (H´, 1/D), saccharase, urease, phosphatase and catalase activities were increased, can reach about 84.3 to 96.4 percentage of CK in green zoon soil, while the cellulase is only about 30.5 and 28.8 percentage in gangue fields. The plant and soil characters could restore to original soil with human control.